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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Copyright (c) 2022 Huawei Device Co., Ltd.
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import PkgInt from './PkgInt';


class SMModel {
  ////////////////////////////////////////////////////////////////
  // constants
  ////////////////////////////////////////////////////////////////
  public static START:number = 0;
  public static ERROR:number = 1;
  public static ITSME:number = 2;

  ////////////////////////////////////////////////////////////////
  // fields
  ////////////////////////////////////////////////////////////////
  protected classTable:PkgInt = null;
  protected classFactor:number = null;
  protected stateTable:PkgInt = null;
  protected charLenTable:number[] = null;
  protected name:string = null;

  ////////////////////////////////////////////////////////////////
  // methods
  ////////////////////////////////////////////////////////////////
  public constructor(classTable:PkgInt,
                     classFactor:number,
                     stateTable:PkgInt,
                     charLenTable:number[],
                     name:string) {
    this.classTable = classTable;
    this.classFactor = classFactor;
    this.stateTable = stateTable;
    this.charLenTable = charLenTable.copyWithin(0, 0, charLenTable.length-1);
    this.name = name;
  }

  public getClass(b:number):number {
    let c:number = b & 0xFF;
    return this.classTable.unpack(c);
  }

  public getNextState(cls:number, currentState:number) {
    return this.stateTable.unpack(currentState * this.classFactor + cls);
  }

  public getCharLen(cls:number):number {
    return this.charLenTable[cls];
  }

  public getName():string {
    return this.name;
  }
}

export default SMModel;